XPost: rec.radio.amateur.policy, uk.radio.amateur   
   From: andrew@nojunqmail.com   
      
   On 04/03/2021 07:53, Ian Jackson wrote:   
      
   > One of my past cars had an infrared fob. It had a range of about 3 feet,   
   > and seemed to do a perfect job of opening and closing the car.   
   > Circuit-wise, it was probably less-complicated than an RF fob (and   
   > receiver), and almost certainly totally immune to RF interference. Are   
   > RF fobs not simply technology for technology's sake?   
      
   You are 100% correct, it is grossly over engineered for the base   
   problem, however RF tech is cheap and easy. IR fobs are rarer and   
   therefore more expensive.   
   It all comes down to money.   
      
   Andy   
      
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